Fireproof casing for elevator-shafts.



No. 734,602. PATBNTED JULY 28, 1903- I I. J. PLUGKER.

FIREPROOF CASING FOR ELEVATOR SHAFTS.

APPLICATION FILED DBO. 5. 1902.

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UNITED STATES Patented uly- 2 8,

PATENT OFFICE.

JACOB J. PLUOKER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR, BY IWIESNEASSIGNMENTS, TO JAMES S. JOHNSON, OF PHILADELPHIA,

PENNSYLVANIA FIREPROOF CASING FOR ELEVATOR-SHAFTS;

SPEGIFIGATION forming part of Letters Patent 0. 734,602, dated. July 281903. Application filed December 5,1902. Serial No. 13 1 084. (Nomodel.)

To all whom it may concern:

Be it known that I, JACOB J. PLUOKER, a citizen of the United States ofAmerica, and a resident of 6820 Paschall avenue, Philadelphia,Pennsylvania, have invented certain new and useful Improvements inFireproof Casings for Elevator-Shafts, of which the following is aspecification.

My invention relates" to improvements in fireproof casings forelevator-shafts, and has for its object to provide a grilleworkconstruction which may be normally opened for the admission of light andair to the shaft and which may also be closed to cut off commuuicationbetween the building and the shaft in case of fire.

In referring to the drawings, wherein like reference-numerals are usedto designate corresponding parts wherever they occur, Figure 1 is afront elevation of a section of grillework-casing embodying myinvention. Fig. 2 is a sectional View showing the grillework. closed.Fig. 3 is a view similar to Fig. 2, showing the grillework open.

My improved casing consists of two series of plates 1 and 2, of iron orother suitable fireproof material, said plates being placed one directlyback of the other. These plates are of exactly the same design and haveopen grillework-sections 3 and closed sections 4, the closed sectionsbeing of the same width as the open sections. The outer of these twoseries of plates is preferably secured to the elevator-shaft casing, andthe inner plate is adapted to be moved by any suitable mechanism, sothat the open and closed sections of each plate may be brought oppositeeach other in each case, which will be the normal positionof the plates,and the shaft will be opened for light and ventilation; but in case offire the movable plate may be moved in relation to the stationary plateso that the closed section of one plate willbe opposite the open sectionof the other plate, and vice versa, whereby the elevatorshaft will beentirely closed and cut off from communication with the rest of thebuilding. Any suitable mechanism may be employed for operating theseplates; but as this mechanism forms no part of the invention disclosedin this application I have not illustrated such a mechanism.

Having thus described myinvention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A grillework for elevator-shafts composed of two series of platesprovided with sections of open grillework and closed sections, saidplates being so'constructed in relation to each other that they may bemoved so as to bring the open parts of each section in register to admitlight and air to the shaft, or may bemoved so that the open parts willbe out of register, and the shaft closed.

2. A grillework for elevator-shafts composed of two series of plates onelocated back of the other and surrounding the shaft, said plates beingof the same design and provided with alternate sections of open andclosed work, one series of plates being permanently fixed in positionand the other series of plates being movable, whereby when the platesare in one position light and air may be admitted to the shaft and whenthey are moved to the other position all communication with the shaft iscut off. H

Signed by meat Baltimore,M-aryland, this 22d day of October,-1902.

JACOB J. PLUOKER. Witnesses: I HOWARD DJ'ADAM S, FRANCIS M. PHELPS.

